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    From agro-waste to encapsulated carbon catalyst for improving stability of naphtha desulfurization

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    Publication date
    2022-10
    End of Embargo
    2023-07-21
    Author
    Mohammed, H.R.
    Hamad, K.I.
    Gheni, S.A.
    Aqar, D.Y.
    Mahomood, M.A.
    Habeeb, O.A.
    Ahmed, S.M.R.
    Rahmanian, Nejat
    Keyword
    Agro-waste
    ODS
    Coating of catalyst
    The kinetics of deactivation
    Mn/AC catalyst
    Rights
    © 2022 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
    Peer-Reviewed
    Yes
    Open Access status
    embargoedAccess
    
    Metadata
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    Abstract
    The deactivation of the oxidative desulfurization (ODS) catalysts is a challenge and is a major concern in industrial catalytic processes. In this work, an activated carbon (AC) was prepared from agricultural waste and modified to withstand the ODS activity loss over time. The AC was impregnated with manganese and coated with aluminum oxide to prolong the activity lifetime. The catalysts were characterized by nitrogen adsorption-desorption, scanning electron microscope, energy dispersive X-ray, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and transition electron microscope (TEM). The BET surface areas of the examined AC materials were 814.48 m2/g, 784.76 m2/g, and 755.03 m2/g for the AC, Mn/AC, and coated Mn/AC catalysts, respectively with a dominance of microporous pore size. The TGA showed that the coating layer retards the degradation of the active metal and suppresses phase transitions. XRD showed no change in the structure of the catalyst with a coating layer, and from the TEM analysis, the coating layer thickness was 3.6 nm. The kinetics of the ODS catalysts were investigated. It was shown that the ODS reaction follows the first-order kinetics and is not influenced by the coating layer. The activity decay was also investigated. It is found that the activation energy of the deactivation reaction over the coated catalyst was higher than the uncoated catalyst.
    URI
    http://hdl.handle.net/10454/19126
    Version
    Accepted Manuscript
    Citation
    Mohammed HR, Hamad KI, Gheni SA et al (2022) From agro-waste to encapsulated carbon catalyst for improving stability of naphtha desulfurization. Diamond and Related Materials. 128: 109267.
    Link to publisher’s version
    https://doi.org/10.1016/j.diamond.2022.109267
    Type
    Article
    Notes
    The full-text of this article will be released for public view at the end of the publisher embargo on 21 Jul 2023.
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    Engineering and Informatics Publications

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